Improvement in apparatus for drying paper



PArHNr @NEIGE WILLIAM H. soLnY, oN PHILADELPHIA, PENNSYLVANIA, AssIGNoR To LEMUEL sMITH, on Nnw Yoax cITY.

I IMPRovEMEN- IN APPARATUS Foa DRVING PAPER.

Specification forming part of Letters Patent No. '115,375, dated May 30, 1871.

I, WILLIAM H. soLnY, of the Cay of :Phn- 1 adelphia, in the State of `Pennsylvania, have invented certain Improvements in the Apparatus forDrying Paper, of which the following is a specification:

.Nature and Objects ofthe liweiitioa. My invention relates to the combined arrangementof a furnacehot-draft flue, enter- I ingand extending along through the interior of a lengthy horizontal case, provided with a I slot in each end for thel entrance and exit of the paper to be dried, and'transverse horizontally-arranged bars for the support of the same `in its passage through the case, togethery with a vertical extension of the said hot-draft ilue at or near theend of the case at which the paper enters the latter, and an exhaust-Hue communicating with the same end of the interior of the case and opening into the vertical portion of the said hot-draft iiue, so that as thev wet paper enters and passes onward through the case it moves along forward over the moderately warm to the hottest portion of the hotdraft iiue, while the draft through the vertical I `portion ofthe latter causes the aqueous vapor to tend toward and be exhausted through the flue leading from the case to the said vertical portion of the hot-hue. The object of my invention is to cause the drying process to begin at a comparatively low temperature, Yand thus allow the sizing and color to become perfectly and uniformly set-before the vmore hardening and drying resultV takes place, and to facilitate the drying by causing theraqueous moisture to tend in a current toward thewettest portion `of the .paper during the drying operation of thesame. 4

Description ofthe Accompanying Drawing. Figure 1 is a vertical longitudinal section of `a paper-drying apparatus embodying my invention.1 Fig. 2is a vertical transverse section u end view of 4the case.`

Geiiewtt Description. A B is along flat rectangular case, support- 3 ed in a horizontal position, above a heat-generatin g furnace, C, the hot-draft iiue c of which enters near one end of the said case A B,-and,

extending along through the same nearly toV narrow supports 2 2, so as to allow the heat of the flue c to radiate freely from all its sides. Just above the iiue c in the case A B there are numerous transverse bars, 3 3, all fixed in the same horizontal plane, which is about midway between the top surface of the horizontal flue c and the cover or lid a of thecase A B and in each -end of the said case there is a horizontal slot, b', in the same plane with the upper surfaces of the bars 3 3, for the entrance and exit of the paper. Directly above the outlet end of the hot-iiue c in the case A B-the vapor-exhausting ue b opens, and, extending upward and laterally, enters the vertical outlet part c of the hot-flue. Within the vertical outlet part of the hot-due there is fixed a slendersteam-pipe, 4, the lower end of which is intended to be connected with the exhaust of any suitable steam engine, (not shown,) while the upper end is fitted with a hollow conical frustum in such a manner that the warm gases of the said upright line may pass upward around both the inside and outside of I the frusturn7 while the exhaust-steam jets pass out through the contracted upper end of the pipe 4, and thus increase the draft of the said vertical flue 0. l

In the operation of this apparatus the paper to be dried enters the slot b', in theend B of the case, from the usual sizing or coloring cylinders, (not shown,) and is drawn along Vover the bars 3 3, and through the slot in the end A of the case, to the usual take-up cylinder, (not shown,) around whichit is wound in a perfectly dry condition, the size and coloring being gradually and uniformly set as the paper is drawn over the bars 3 near the entrance end of the case, the moisture gradually evaporated as it advances, and the whole thoroughly dried as it passes over the hotter portions of the horizontal flue c before the paper passes out to the take-up cylinder, the exhausting action of the vertical outlet-flue causing the evaporated moisture or aqueous vapor to pass rapidly in a contrary direction to that of the paper in the case.

Claims.

near that end of the case A B at which the paper passes out of the same, and the cooler end of the said iue o near that end of the said case at which the paper enters, substantially as and for the purpose hereinbefore set forth and described.

3. The arrangement of the vapor-exhausting ilue b in relation to the case A B and the hotdraft flue c, so that the current of vapor will be from the hottest end of the case toward the cooler end of the same, substantially as and for the purpose hereinbefore set forth and described.

Witnesses: WM. H. SOLEY.

BENJ. MORISON, WM. H. MORISON. 

